Wood, like knocking on wood is best done either by FM or with a particular Comb-Filter (like in u-he Zebra). It takes a little envelope optimization for the FM to get it from bell-ish to wood-ish. Could be that with Karplus-Strong (MicroFreak) synthesis and maybe a filter this is possible too.
A dumb knocking sound can be simulated with an analogue approach like @darenager suggests. The envelopes are very important and the filter including the characteristics of the filter resonance. I would say, not every analogue synth is capable to generate a convincing wood tone.
Hollow sounds are more complicated to achieve, if they shall sound like a sound put through a tube or inside a chamber. The typical frequency structure is missing some mid-range frequencies. But from my experience a notch-filter or a EQ is not giving us exactly what we desire (at least not for me). There are some physical modelling algorithms available, which do exactly this, simulate a tube. Plaits/MicroFreak provide this and it’s called the PL.Modal, which is a modal synthesis.
TBH … and I don’t want to be negative … but to get a really good sounding hollow timbre directly from a standard analogue synth is not easy. Digital has it’s strength as well as analogue has it’s strength. IMO the spectrum of a hollow-tone is much more complex, then a standard analogue synth is prepared to deliver.
But can we do a kind of simulation of a tube or chamber by FX? I think yes.
AFAIK inside a tube there is some complex reflection and phase-difference going on between the waves. Similar goes for a chamber. Those modes weaken or kill some frequencies, which makes this tone so special. It can be compared to layer some signals, which are a little out of phase (this is sometimes a problem at the mixing desk and hollow sounds are corrected by correcting the phases and EQ-ing).
Using some layered sounds, phase shifting, delay, and reverb could work as a simulation.